As should be fairly apparent at first glance, Nimble Quest is a re-imagining of Snake, only instead of the focus being on collecting pellets and avoiding your own ever-growing body, for the most part your body remains at a manageable size and the object of the game is to skillfully avoid enemies while coming close enough to get them in range of your attacks.
The game is originally from mobile devices, and to a degree it shows. Options are minimal, barely acceptable. UI is clearly designed for touch and though functional with a controller, really works better with a mouse. As a personal preference I prefer a d-pad for the game itself, though I'm sure the keyboard works just fine. It also has mouse controls that mimic the touch controls from phones.
The gameplay is pretty dull at first, to be honest. Playing it for than fifteen minutes at time before boredom sets in is impossible. The game was clearly designed as a grindfest. However, once you've done that grind, gotten your upgrades, and worked your way to the higher levels, the game becomes far more enjoyable. The levels are hectic and engaging, with enemies galore and items all over the screen, a far cry from the more sparse environments of earlier levels. Your line of heroes should be longer at this point as well, meaning you need to pay more attention to your own movements to avoid running into yourself. All the same elements are present, but the increase in the amount of things you need to process keeps you from just sitting and staring at the screen and lets you get immersed in split-second reactions. It's a great experience and a shame it's hiding behind the dull grind that may scare people off before they ever see the more interesting later levels. If you do wish to cut right to the chase and get to the good stuff though, it's a fairly simple registry edit
(as far as messing with your registry goes, anyway, which isn't for everyone), and I wouldn't really blame you if you wanted to go ahead and skip the grind.
All in all, the game's got a good set of underlying mechanics hidden behind some unfortunate vestiges of mobile design. On sale though it's hard not to recommend, especially at the $0.49 I paid for it (and card sales bring that number down even further). If you're looking for a fast-paced arcade action game, this one does a pretty good job of it.